Agilent Technologies Infiniium 90000 Q-Series, Programmer'S Manual

Page: 503 / 1186

Measure Commands
25
Agilent Infiniium 90000 Series Oscilloscopes Programmer's Reference 503
<data_rate> A real number for the base data rate in bits per second.
<peaking>
The peaking value in dB.
<jtf_loop_
bandwidth>
A real number for the cutoff frequency for the PLL to track.
<multiplier> An integer used as the multiplication factor.
<clock_freq>
A real number used for the clock frequency of the PLL.
Example This example sets the clock recovery method to Second Order PLL, a
nominal data rate of 4 Gb/s, and a peaking value of 1.25 dB.
myScope.WriteString ":MEASure:CLOCk:METHod:JTF SOPLL,4E9,3.822E6,1.25"
Query
:MEASure:CLOCk:METHod:JTF?
The :MEASure:CLOCk:METHod:JTF? query returns the state of the clock
recovery method.
Returned Format
[:MEASure:CLOCk:METHod:JTF]
{FOPLL,<data_rate>,<jtf_loop_bandwidth>}
| {EQFOPLL,<data_rate>,<jtf_loop_bandwidth>}
| {SOPLL,<data_rate>,<jtf_loop_bandwidth>,<peaking>}
| {EQSOPLL,<data_rate>,<jtf_loop_bandwidth>,<peaking>}
| {EXPFOPLL <source>,{RISing | FALLing | BOTH},
<multiplier>,<clock_freq>,<jtf_loop_bandwidth>}
| {EXPSOPLL <source>,{RISing | FALLing | BOTH},
<multiplier>,<clock_freq>,<jtf_loop_bandwidth>,<peaking>}
Example
This example places the current setting of the clock recovery method in
the variable strSetting, then prints the contents of the variable to the
computer's screen.
myScope.WriteString ":SYSTem:HEADer OFF"
myScope.WriteString ":MEASure:CLOCk:METHod:JTF?"
strSetting = myScope.ReadString
Debug.Print strSetting
See Also • ":MEASure:CLOCk:METHod:OJTF" on page 504
• ":MEASure:CLOCk:METHod" on page 496